Gunbarrel issues

Arcadia1

Hi, I was hoping to get some advice on how to proceed with an issue thats come up during the renovation of a bathroom in my house.
Ive taken up the floor in order to install a wetroom and discovered that the gunbarrel plumbing to the radiator has some corrosion. It will have to be removed and replaced with copper piping, obviously.
The thing is that Ill have to connect the rest of the gunbarrel to the new section of copper, as the radiator line runs along the inside of the external wall.
Ive dug up a half meter on both sides of the new bathrooms partition walls to examine the gunbarrel and its in very good condition.
I believe that the corrosion in the area Im working in was caused by the fact that there was a bath located directly above the affected section and some water must have been seeping into the concrete over time and getting down to the pipe.
Whats the simplest way of joining the copper to the gunbarrel-will I have to cut it and rethread the steel pipe to take a connecting section?
Is there an easier way short of digging up all the radiator plumbing?
Also, when we got down to the sub floor, we discovered that the soil pipe for the toilet(clay) had broken, albeit cleanly, at the level. The fluted section is intact as is the pipe going down into the sub floor-there is no damage bar the clean break.
Is it possible to cement the pipe back together and or seal it?
It will obviously be buried in the new floor, four inches of concrete mix.
Kind regards
JohnC

DoneDL

If the gunbarrel is in good condition then you can rethread and use a copper to iron fitting and dose the system well with inhibitor after testing and wrapping with insulation to prevent the new concrete corroding the pipework. As regards the soil pipe ask at your local builders merchant and you`ll probably get something like this

deepspeed

Arcadia1 wrote: »

Hi, I was hoping to get some advice on how to proceed with an issue thats come up during the renovation of a bathroom in my house.
Ive taken up the floor in order to install a wetroom and discovered that the gunbarrel plumbing to the radiator has some corrosion. It will have to be removed and replaced with copper piping, obviously.
The thing is that Ill have to connect the rest of the gunbarrel to the new section of copper, as the radiator line runs along the inside of the external wall.
Ive dug up a half meter on both sides of the new bathrooms partition walls to examine the gunbarrel and its in very good condition.
I believe that the corrosion in the area Im working in was caused by the fact that there was a bath located directly above the affected section and some water must have been seeping into the concrete over time and getting down to the pipe.
Whats the simplest way of joining the copper to the gunbarrel-will I have to cut it and rethread the steel pipe to take a connecting section?
Is there an easier way short of digging up all the radiator plumbing?
Also, when we got down to the sub floor, we discovered that the soil pipe for the toilet(clay) had broken, albeit cleanly, at the level. The fluted section is intact as is the pipe going down into the sub floor-there is no damage bar the clean break.
Is it possible to cement the pipe back together and or seal it?
It will obviously be buried in the new floor, four inches of concrete mix.
Kind regards
JohnC

While you are doing renovations, would you not consider dumping the gunbarrel and replacing it completely with a Zoned system with rad manifold and sensors etc.? i.e. Modernise the whole house.

We battled with our gunbarrel for years and eventually had to bite the bullet. We are now in the process of kango-ing up floors and putting down factory-insulated al-pex piping to each rad.

Its causing us a couple of weeks of moving out, and about 3K euro (The €3000 euro includes all new rads in house and a new 300L cylinder, all parts and labour), but we will be so glad to be rid of the headache, plus the system will be so much more efficient and we will have complete control of each rad individually thru thermostats etc.

We never could put down nice flooring because we were always "scared" of the "incase we had to rip-up".

Hope that doesnt scare you... :-)

Arcadia1

Looks like a very good price for the house, for that job. My place is big and old and cold, unfortunately I haven't the time to address the entire plumbing system-I'm under pressure for a decent bathroom from my missus :-) so that comes first-of course!
I realise it makes sense to do it all in a go, of course but it will have to be this way for me right now.
Many thanks for the replies folks!#
By the way, I've seen so much in my place, nothing scares me anymore!!:-)))